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For coarse-grained materials the flow processes at elevated temperatures are intragranular in nature and p = 0 but when the grain size is reduced other flow processes become important which are dependent on the grain size  such as Nabarro¨CHerring  and Coble diffusion creep and superplasticity.

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ÇãÇäЦÓïÈç´æ: ½ð±Ò+15, ·­ÒëEPI+1 2015-10-17 21:09:30
For coarse-grained materials the flow processes at elevated temperatures are intragranular in nature and p = 0 but when the grain size is reduced other flow processes become important which are dependent on the grain size  such as Nabarro¨CHerring  and Coble diffusion creep and superplasticity.

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